<header>
        <div class="header-first">
            <ul>
                <li class="Login">你好 ! 请登录</li>
                <li id="welcome" style="display: none"></li>
                <li class="line">|</li>
                <li class="tuichu" style="display: none">退出登录</li>
                <li class="zhuce">注册</li>
            </ul>
            <span class="payment">线下支付</span>
        </div>
</header>